Suggestions for what? Next time?
I use an alarm clock. Filling a 23g tote usually takes 5 to 6 1/2 hours with my RO/DI. I always calculate it first based on the gph of the last fill. Fill time depends on filter age and water temp...which affects psi.
So I set the clock for anywhere from 4 1/2 to 6 hours...whatever I've calculated. But the alarm is always set for well BEFORE the end time. If I need more time....say 1/2 hour....I'll advance the alarm 20 minutes. But near the end I am always hovering around the tote. Not one flood ....yet.
Long story short....for 15 minutes?.....stand there and watch it. I don't get why you would choose to go to sleep at that point
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Cheers,